Table 1.
Characteristics of 190 patients, 190 renal masses, and 190 biopsy procedures
| Variable | Value | |
|---|---|---|
| Patient | ||
| Age (y) | Mean ± SD (range) | 64.8 ± 13.4 (25–91) |
| Sex | Man/woman | 129/61 |
| Anticoagulants or antiplatelet medications | Yes/no | 47/143 |
| Initial follow-up image | Plain CT/Contrast-enhanced CT/Dynamic CT/Plain MRI/Dynamic MRI/CT angiography scans during TAE | 43/7/98/5/1/36 |
| Renal mass | ||
| Size (cm) | Mean ± SD (range) | 2.1 ± 0.70 (0.6–3.8) |
| Laterality | Right kidney/Left kidney/Renal allograft | 102/86/2 |
| Position | Exophytic/Parenchymal/Mixed/Central | 140/10/22/18 |
| Longitudinal location | Upper/Lower | 99/91 |
| Antero-posterior location | Dorsal/Ventral | 105/85 |
| Biopsy procedure | ||
| Patient position | Prone/Supine/Lateral | 183/2/5 |
| Guiding image | Ultrasound/CT fluoroscopy (with contrast medium)/Both | 42/140 (53)/8 |
| Needle gauge | 18-gauge/20-gauge/Both | 186/3/1 |
| Number of fires | Mean ± SD (range) | 3.4 ± 1.1 (1–9) |
SD: standard deviation, CT: computed tomography, MRI: magnetic resonance imaging, TAE: transarterial embolization